Revision history for entry Venema, Yde (1993). "Derivation rules as anti-axioms in modal logic" [VENDRA]

NB: for privacy reasons, few details are provided in public revision histories.
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2013-11-22T12:07:49updateSystem / admin update -
2013-11-04T10:50:18updateSystem / admin update -
2011-05-16T22:56:09update